package com.cmii.sjw.department.control.jsc.controller;

import cn.hutool.core.codec.Base64;
import cn.hutool.core.util.IdUtil;
import com.cmii.sjw.department.control.common.RedisService;
import com.cmii.sjw.department.control.jsc.constant.Constants;
import com.cmii.sjw.department.control.jsc.util.Result;
import com.google.code.kaptcha.Producer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.FastByteArrayOutputStream;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import jakarta.annotation.Resource;
import javax.imageio.ImageIO;
import jakarta.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * 验证码操作处理
 * @Author jfh
 * @Date 2025-01-20 周一 11:11
 * @Version 1.0
 */
@Slf4j
@RestController
@CrossOrigin
@RequestMapping("/captcha")
public class CaptchaController {

    @Resource(name = "captchaProducer")
    private Producer captchaProducer;

    @Resource(name = "captchaProducerMath")
    private Producer captchaProducerMath;

    @Resource
    private RedisService redisService;

    /**
     * 验证码
     * @param response
     * @return
     * @throws IOException
     */
    @GetMapping("/captchaImage")
    public Result getCaptcha(HttpServletResponse response) throws IOException {
        Map<String, Object> result = new HashMap<>();
        // 保存验证码信息
        String uuid = IdUtil.fastSimpleUUID();
        String verifyKey = Constants.CAPTCHA_CODE_KEY + uuid;

        String capStr = null, code = null;
        BufferedImage image = null;

        //数学类型
        String capText = captchaProducerMath.createText();
        capStr = capText.substring(0, capText.lastIndexOf("@"));
        code = capText.substring(capText.lastIndexOf("@") + 1);
        image = captchaProducerMath.createImage(capStr);

        //字母类型
//        capStr = code = captchaProducer.createText();
//        image = captchaProducer.createImage(capStr);

        redisService.set(verifyKey, code, 2, TimeUnit.MINUTES);
        // 转换流信息写出
        FastByteArrayOutputStream os = new FastByteArrayOutputStream();
        try
        {
            ImageIO.write(image, "jpg", os);
        }
        catch (IOException e)
        {
            return Result.error(e.getMessage());
        }

        result.put("uuid", uuid);
        result.put("img", Base64.encode(os.toByteArray()));
        return Result.success(result);
    }
}
